<template>
 <div>
  <h4 @click="demoFn">{{de}}</h4>
 </div>
</template>

<script>
export default {
  data () {
return {
 de:'你好世界'
}
  },
  methods : {
    demoFn() {
      console.log('学不明白');
    }
  }
}
</script>

<style>

</style>